{"id":2232809,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2232809/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-tegra/patch/20260505100523.1922388-10-vladimir.oltean@nxp.com/","project":{"id":21,"url":"http://patchwork.ozlabs.org/api/1.2/projects/21/?format=json","name":"Linux Tegra Development","link_name":"linux-tegra","list_id":"linux-tegra.vger.kernel.org","list_email":"linux-tegra@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260505100523.1922388-10-vladimir.oltean@nxp.com>","list_archive_url":null,"date":"2026-05-05T10:05:01","name":"[v8,phy-next,09/31] PCI: Remove device links to PHY","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"4a4ccb78275e34416bff8c45b22308372dc26a64","submitter":{"id":75582,"url":"http://patchwork.ozlabs.org/api/1.2/people/75582/?format=json","name":"Vladimir Oltean","email":"vladimir.oltean@nxp.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-tegra/patch/20260505100523.1922388-10-vladimir.oltean@nxp.com/mbox/","series":[{"id":502802,"url":"http://patchwork.ozlabs.org/api/1.2/series/502802/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-tegra/list/?series=502802","date":"2026-05-05T10:04:55","name":"Split Generic PHY consumer and provider API","version":8,"mbox":"http://patchwork.ozlabs.org/series/502802/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2232809/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2232809/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-tegra@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=nxp.com header.i=@nxp.com header.a=rsa-sha256\n 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linux-renesas-soc@vger.kernel.org, linux-riscv@lists.infradead.org,\n linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org,\n linux-scsi@vger.kernel.org, linux-sunxi@lists.linux.dev,\n linux-tegra@vger.kernel.org, linux-usb@vger.kernel.org,\n netdev@vger.kernel.org, spacemit@lists.linux.dev,\n UNGLinuxDriver@microchip.com, Bjorn Helgaas ,\n Manivannan Sadhasivam ,\n Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?=\n\t=?utf-8?q?ski?= , Rob Herring ,\n Vignesh Raghavendra ,\n Siddharth Vadapalli ","Subject":"[PATCH v8 phy-next 09/31] PCI: Remove device links to PHY","Date":"Tue, 5 May 2026 13:05:01 +0300","Message-Id":"<20260505100523.1922388-10-vladimir.oltean@nxp.com>","X-Mailer":"git-send-email 2.34.1","In-Reply-To":"<20260505100523.1922388-1-vladimir.oltean@nxp.com>","References":"<20260505100523.1922388-1-vladimir.oltean@nxp.com>","Content-Type":"text/plain; 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cef60d58-3980-4f51-46e9-08deaa8de4a7","X-MS-Exchange-CrossTenant-AuthSource":"AM9PR04MB8585.eurprd04.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-OriginalArrivalTime":"05 May 2026 10:05:53.8432\n (UTC)","X-MS-Exchange-CrossTenant-FromEntityHeader":"Hosted","X-MS-Exchange-CrossTenant-Id":"686ea1d3-bc2b-4c6f-a92c-d99c5c301635","X-MS-Exchange-CrossTenant-MailboxType":"HOSTED","X-MS-Exchange-CrossTenant-UserPrincipalName":"\n sp3hOfxwbRS87L0nwgVFZOL95U+C9sOtEs1wM7zzvHB7nEV59XOQhYE8iXXWGpnvbSjGQkvDLvNG8B8RV55uaQ==","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"DB9PR04MB8363"},"content":"This is practically a full revert of commit\n7a4db656a635 (\"PCI: dra7xx: Create functional dependency between PCIe and PHY\")\nand a partial revert of the device link pieces from commits\ndfb80534692d (\"PCI: cadence: Add generic PHY support to host and EP drivers\")\n49229238ab47 (\"PCI: keystone: Cleanup PHY handling\")\n\nThe trouble with these commits is that they dereference fields inside\nstruct phy from a consumer driver, which will become no longer possible.\n\nSince commit 987351e1ea77 (\"phy: core: Add consumer device link\nsupport\") from 2019, the PHY core also adds a device link to order PHY\nprovider and consumer suspend/resume operations. All reverted commits\nare from 2017-2018, and what they do should actually be redundant now.\n\nSigned-off-by: Vladimir Oltean \nAcked-by: Bjorn Helgaas \nReviewed-by: Manivannan Sadhasivam \n---\nCc: Lorenzo Pieralisi \nCc: \"Krzysztof Wilczyński\" \nCc: Manivannan Sadhasivam \nCc: Rob Herring \nCc: Bjorn Helgaas \nCc: Vignesh Raghavendra \nCc: Siddharth Vadapalli \n\nv7->v8: only context change - \"return 0\" became \"return ret\" for\n cdns_plat_pcie_probe()\nv6->v7: none\nv5->v6: collect tag from Manivannan Sadhasivam\nv3->v5: none\nv2->v3:\n- remove dangling set but unused phy_count local variable in\n cdns_plat_pcie_probe()\nv1->v2:\n- fully remove struct device link **link from struct cdns_pcie and from\n cdns_plat_pcie_probe() error path\n- collect tag from Bjorn Helgaas\n- adjust commit title\n---\n .../controller/cadence/pcie-cadence-plat.c | 4 ---\n drivers/pci/controller/cadence/pcie-cadence.c | 16 +---------\n drivers/pci/controller/cadence/pcie-cadence.h | 2 --\n drivers/pci/controller/dwc/pci-dra7xx.c | 16 ----------\n drivers/pci/controller/dwc/pci-keystone.c | 31 +++----------------\n 5 files changed, 5 insertions(+), 64 deletions(-)","diff":"diff --git a/drivers/pci/controller/cadence/pcie-cadence-plat.c b/drivers/pci/controller/cadence/pcie-cadence-plat.c\nindex 8b12a46b5601..6fd16e09e244 100644\n--- a/drivers/pci/controller/cadence/pcie-cadence-plat.c\n+++ b/drivers/pci/controller/cadence/pcie-cadence-plat.c\n@@ -41,7 +41,6 @@ static int cdns_plat_pcie_probe(struct platform_device *pdev)\n \tstruct pci_host_bridge *bridge;\n \tstruct cdns_pcie_ep *ep;\n \tstruct cdns_pcie_rc *rc;\n-\tint phy_count;\n \tbool is_rc;\n \tint ret;\n \n@@ -122,9 +121,6 @@ static int cdns_plat_pcie_probe(struct platform_device *pdev)\n \tpm_runtime_put_sync(dev);\n \tpm_runtime_disable(dev);\n \tcdns_pcie_disable_phy(cdns_plat_pcie->pcie);\n-\tphy_count = cdns_plat_pcie->pcie->phy_count;\n-\twhile (phy_count--)\n-\t\tdevice_link_del(cdns_plat_pcie->pcie->link[phy_count]);\n \n \treturn ret;\n }\ndiff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c\nindex a1eada56edba..0ac980249941 100644\n--- a/drivers/pci/controller/cadence/pcie-cadence.c\n+++ b/drivers/pci/controller/cadence/pcie-cadence.c\n@@ -222,7 +222,6 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)\n \tstruct device_node *np = dev->of_node;\n \tint phy_count;\n \tstruct phy **phy;\n-\tstruct device_link **link;\n \tint i;\n \tint ret;\n \tconst char *name;\n@@ -238,10 +237,6 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)\n \tif (!phy)\n \t\treturn -ENOMEM;\n \n-\tlink = devm_kcalloc(dev, phy_count, sizeof(*link), GFP_KERNEL);\n-\tif (!link)\n-\t\treturn -ENOMEM;\n-\n \tfor (i = 0; i < phy_count; i++) {\n \t\tof_property_read_string_index(np, \"phy-names\", i, &name);\n \t\tphy[i] = devm_phy_get(dev, name);\n@@ -249,17 +244,10 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)\n \t\t\tret = PTR_ERR(phy[i]);\n \t\t\tgoto err_phy;\n \t\t}\n-\t\tlink[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS);\n-\t\tif (!link[i]) {\n-\t\t\tdevm_phy_put(dev, phy[i]);\n-\t\t\tret = -EINVAL;\n-\t\t\tgoto err_phy;\n-\t\t}\n \t}\n \n \tpcie->phy_count = phy_count;\n \tpcie->phy = phy;\n-\tpcie->link = link;\n \n \tret = cdns_pcie_enable_phy(pcie);\n \tif (ret)\n@@ -268,10 +256,8 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)\n \treturn 0;\n \n err_phy:\n-\twhile (--i >= 0) {\n-\t\tdevice_link_del(link[i]);\n+\twhile (--i >= 0)\n \t\tdevm_phy_put(dev, phy[i]);\n-\t}\n \n \treturn ret;\n }\ndiff --git a/drivers/pci/controller/cadence/pcie-cadence.h b/drivers/pci/controller/cadence/pcie-cadence.h\nindex 574e9cf4d003..232b504b5cf9 100644\n--- a/drivers/pci/controller/cadence/pcie-cadence.h\n+++ b/drivers/pci/controller/cadence/pcie-cadence.h\n@@ -82,7 +82,6 @@ struct cdns_plat_pcie_of_data {\n * @is_rc: tell whether the PCIe controller mode is Root Complex or Endpoint.\n * @phy_count: number of supported PHY devices\n * @phy: list of pointers to specific PHY control blocks\n- * @link: list of pointers to corresponding device link representations\n * @ops: Platform-specific ops to control various inputs from Cadence PCIe\n * wrapper\n * @cdns_pcie_reg_offsets: Register bank offsets for different SoC\n@@ -95,7 +94,6 @@ struct cdns_pcie {\n \tbool\t\t\t is_rc;\n \tint\t\t\t phy_count;\n \tstruct phy\t\t **phy;\n-\tstruct device_link\t **link;\n \tconst struct cdns_pcie_ops *ops;\n \tconst struct cdns_plat_pcie_of_data *cdns_pcie_reg_offsets;\n };\ndiff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c\nindex cd904659c321..9c1aef4d0bd1 100644\n--- a/drivers/pci/controller/dwc/pci-dra7xx.c\n+++ b/drivers/pci/controller/dwc/pci-dra7xx.c\n@@ -9,7 +9,6 @@\n \n #include \n #include \n-#include \n #include \n #include \n #include \n@@ -679,7 +678,6 @@ static int dra7xx_pcie_probe(struct platform_device *pdev)\n \tint i;\n \tint phy_count;\n \tstruct phy **phy;\n-\tstruct device_link **link;\n \tvoid __iomem *base;\n \tstruct dw_pcie *pci;\n \tstruct dra7xx_pcie *dra7xx;\n@@ -727,10 +725,6 @@ static int dra7xx_pcie_probe(struct platform_device *pdev)\n \tif (!phy)\n \t\treturn -ENOMEM;\n \n-\tlink = devm_kcalloc(dev, phy_count, sizeof(*link), GFP_KERNEL);\n-\tif (!link)\n-\t\treturn -ENOMEM;\n-\n \tdra7xx->clk = devm_clk_get_optional(dev, NULL);\n \tif (IS_ERR(dra7xx->clk))\n \t\treturn dev_err_probe(dev, PTR_ERR(dra7xx->clk),\n@@ -745,12 +739,6 @@ static int dra7xx_pcie_probe(struct platform_device *pdev)\n \t\tphy[i] = devm_phy_get(dev, name);\n \t\tif (IS_ERR(phy[i]))\n \t\t\treturn PTR_ERR(phy[i]);\n-\n-\t\tlink[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS);\n-\t\tif (!link[i]) {\n-\t\t\tret = -EINVAL;\n-\t\t\tgoto err_link;\n-\t\t}\n \t}\n \n \tdra7xx->base = base;\n@@ -852,10 +840,6 @@ static int dra7xx_pcie_probe(struct platform_device *pdev)\n \tpm_runtime_disable(dev);\n \tdra7xx_pcie_disable_phy(dra7xx);\n \n-err_link:\n-\twhile (--i >= 0)\n-\t\tdevice_link_del(link[i]);\n-\n \treturn ret;\n }\n \ndiff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c\nindex fe4836925c4e..cab9fad212ad 100644\n--- a/drivers/pci/controller/dwc/pci-keystone.c\n+++ b/drivers/pci/controller/dwc/pci-keystone.c\n@@ -130,7 +130,6 @@ struct keystone_pcie {\n \tint\t\t\tnum_lanes;\n \tu32\t\t\tnum_viewport;\n \tstruct phy\t\t**phy;\n-\tstruct device_link\t**link;\n \tstruct\t\t\tdevice_node *msi_intc_np;\n \tstruct irq_domain\t*intx_irq_domain;\n \tstruct device_node\t*np;\n@@ -1130,7 +1129,6 @@ static int ks_pcie_probe(struct platform_device *pdev)\n \tenum dw_pcie_device_mode mode;\n \tstruct dw_pcie *pci;\n \tstruct keystone_pcie *ks_pcie;\n-\tstruct device_link **link;\n \tstruct gpio_desc *gpiod;\n \tstruct resource *res;\n \tvoid __iomem *base;\n@@ -1201,31 +1199,17 @@ static int ks_pcie_probe(struct platform_device *pdev)\n \tif (!phy)\n \t\treturn -ENOMEM;\n \n-\tlink = devm_kcalloc(dev, num_lanes, sizeof(*link), GFP_KERNEL);\n-\tif (!link)\n-\t\treturn -ENOMEM;\n-\n \tfor (i = 0; i < num_lanes; i++) {\n \t\tsnprintf(name, sizeof(name), \"pcie-phy%d\", i);\n \t\tphy[i] = devm_phy_optional_get(dev, name);\n \t\tif (IS_ERR(phy[i])) {\n \t\t\tret = PTR_ERR(phy[i]);\n-\t\t\tgoto err_link;\n-\t\t}\n-\n-\t\tif (!phy[i])\n-\t\t\tcontinue;\n-\n-\t\tlink[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS);\n-\t\tif (!link[i]) {\n-\t\t\tret = -EINVAL;\n-\t\t\tgoto err_link;\n+\t\t\tgoto err;\n \t\t}\n \t}\n \n \tks_pcie->np = np;\n \tks_pcie->pci = pci;\n-\tks_pcie->link = link;\n \tks_pcie->num_lanes = num_lanes;\n \tks_pcie->phy = phy;\n \n@@ -1235,7 +1219,7 @@ static int ks_pcie_probe(struct platform_device *pdev)\n \t\tret = PTR_ERR(gpiod);\n \t\tif (ret != -EPROBE_DEFER)\n \t\t\tdev_err(dev, \"Failed to get reset GPIO\\n\");\n-\t\tgoto err_link;\n+\t\tgoto err;\n \t}\n \n \t/* Obtain references to the PHYs */\n@@ -1250,7 +1234,7 @@ static int ks_pcie_probe(struct platform_device *pdev)\n \n \tif (ret) {\n \t\tdev_err(dev, \"failed to enable phy\\n\");\n-\t\tgoto err_link;\n+\t\tgoto err;\n \t}\n \n \tplatform_set_drvdata(pdev, ks_pcie);\n@@ -1337,25 +1321,18 @@ static int ks_pcie_probe(struct platform_device *pdev)\n \tpm_runtime_disable(dev);\n \tks_pcie_disable_phy(ks_pcie);\n \n-err_link:\n-\twhile (--i >= 0 && link[i])\n-\t\tdevice_link_del(link[i]);\n-\n+err:\n \treturn ret;\n }\n \n static void ks_pcie_remove(struct platform_device *pdev)\n {\n \tstruct keystone_pcie *ks_pcie = platform_get_drvdata(pdev);\n-\tstruct device_link **link = ks_pcie->link;\n-\tint num_lanes = ks_pcie->num_lanes;\n \tstruct device *dev = &pdev->dev;\n \n \tpm_runtime_put(dev);\n \tpm_runtime_disable(dev);\n \tks_pcie_disable_phy(ks_pcie);\n-\twhile (num_lanes--)\n-\t\tdevice_link_del(link[num_lanes]);\n }\n \n static struct platform_driver ks_pcie_driver = {\n","prefixes":["v8","phy-next","09/31"]}